CN113809828A - Control method and device of grounding disconnecting link - Google Patents
Control method and device of grounding disconnecting link Download PDFInfo
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- CN113809828A CN113809828A CN202111066884.7A CN202111066884A CN113809828A CN 113809828 A CN113809828 A CN 113809828A CN 202111066884 A CN202111066884 A CN 202111066884A CN 113809828 A CN113809828 A CN 113809828A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The embodiment of the invention discloses a control method and a control device of a grounding disconnecting link. The control method of the grounding disconnecting link comprises the following steps: acquiring the voltage of a line detected by a voltage transformer and a first voltage state of the line detected by a high-voltage electroscope; the circuit is the circuit where the grounding disconnecting link is located; determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer; determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line; and controlling the grounding knife switch according to the actual voltage state of the line. The control method and the control device for the grounding disconnecting link provided by the embodiment of the invention can improve the reliability of control.
Description
Technical Field
The embodiment of the invention relates to a switch control technology, in particular to a control method and a control device of a grounding disconnecting link.
Background
With the development of intelligent substations and the continuous and deepened application of unattended substations, the popularization and application research work for remote operation of relay protection devices and primary equipment (switches and isolation switches) scheduling terminals (scheduling master stations, monitoring background and the like) is developed at home and abroad. The remote control operation of a primary device remote control switch, an isolation switch, a relay protection device remote throwing and withdrawing soft pressing plate, a control word (throwing and withdrawing reclosing), and the like is mainly carried out. The remote control of the primary equipment grounding disconnecting link of the transformer substation needs to ensure the reliability of control.
At present, the existing control method of the grounding disconnecting link generally needs manual assistance when the grounding disconnecting link is controlled, an operator needs to arrive at a site in time to check whether a power failure line is electrified or not, the operator confirms that equipment in the line and the line has power failure through an electroscope, and the operator can close the grounding disconnecting link, so that the problems of low working efficiency and low safety exist, and the reliability of control is influenced.
Disclosure of Invention
The embodiment of the invention provides a control method and a control device of a grounding disconnecting link, which are used for improving the reliability of control.
In a first aspect, an embodiment of the present invention provides a method for controlling a grounding switch, including:
acquiring the voltage of a line detected by a voltage transformer and a first voltage state of the line detected by a high-voltage electroscope; the circuit is the circuit where the grounding disconnecting link is located;
determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer;
determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line;
and controlling the grounding knife switch according to the actual voltage state of the line.
Optionally, determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer, including:
when the voltage of the line detected by the voltage transformer is lower than a first preset threshold value, determining that a second voltage state of the line is a no-voltage state;
and when the voltage of the line detected by the voltage transformer is higher than a second preset threshold value, determining that the second voltage state of the line is a voltage state.
Optionally, determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line includes:
when the first voltage state of the line and the second voltage state of the line are both non-voltage states, determining that the line is in the non-voltage state;
and when the first voltage state of the line and/or the second voltage state of the line are/is a voltage state, determining that the line is in the voltage state.
Optionally, controlling the grounding switch according to the actual voltage state of the line, including:
and when the line is in a non-voltage state, controlling the grounding disconnecting link to carry out switching-on operation.
Optionally, after determining the second voltage state of the line, the method includes:
detecting the high-voltage electroscope according to the first voltage state of the line and the second voltage state of the line to obtain a detection result;
and generating a normal or abnormal signal of the high-voltage electroscope according to the detection result, and transmitting the normal or abnormal signal of the high-voltage electroscope to the dispatching master station.
Optionally, detecting the high-voltage electroscope and obtaining a detection result according to the first voltage state of the line and the second voltage state of the line, including:
performing logical AND and negation on the first voltage state of the circuit and the second voltage state of the circuit, and obtaining a first output result after a preset time delay; wherein the first voltage state is 0 or 1, and the second voltage state is 0 or 1;
performing logical AND on the first voltage state of the line and the second voltage state of the line to obtain a second output result;
and performing logical AND on the first output result and the second output result to obtain a final output result, and determining whether the detection result of the high-voltage electroscope is normal or abnormal according to the final output result.
Optionally, after determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line, the method includes:
verifying the determined actual voltage state of the line;
and if the actual voltage states of the lines before and after verification are different, outputting an alarm signal and sending a corresponding alarm prompt.
In a second aspect, an embodiment of the present invention further provides a control device for a grounding switch, including: the system comprises an input module, a logic judgment module, a self-checking module, a power module and an output module, wherein the logic judgment module and the self-checking module are electrically connected with the input module, the power module and the output module;
the logic judgment module is used for acquiring a first voltage state of a line detected by the voltage transformer and a second voltage state of the line detected by the high-voltage electroscope; the circuit is the circuit where the grounding disconnecting link is located; determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line; and controlling the grounding knife switch in the line to perform switching-off operation or switching-on operation according to the actual voltage state of the line.
Optionally, the self-checking module is configured to perform self-checking on the state of the control device, and output an alarm signal and send a corresponding alarm prompt when detecting that the state of the control device is abnormal.
Optionally, the power module is configured to supply power to the logic determination module and the self-checking module, and is further configured to detect a working state of the power module itself, and send an alarm prompt when the working state of the power module itself is detected to be abnormal.
According to the control method and device for the grounding disconnecting link, provided by the embodiment of the invention, the voltage of a line detected by a voltage transformer and the first voltage state of the line detected by a high-voltage electroscope are obtained; the circuit is the circuit where the grounding disconnecting link is located; determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer; determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line; therefore, the grounding knife switch is controlled according to the actual voltage state of the line. According to the control method and the control device for the grounding disconnecting link, the grounding disconnecting link is controlled according to the actual voltage state of the line determined by the first voltage state of the line and the second voltage state of the line, the remote control of the grounding disconnecting link can be realized, manual assistance is not needed, and the control reliability can be improved.
Drawings
Fig. 1 is a flowchart of a method for controlling a grounding switch according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a voltage state logic operation according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a self-test logic according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for controlling a grounding switch according to a second embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a logic operation of a high voltage electroscope according to a second embodiment of the present invention;
fig. 6 is a block diagram of a control device of a grounding switch according to a third embodiment of the present invention;
fig. 7 is a schematic diagram of a grounding switch and a control device according to a third embodiment of the present invention;
fig. 8 is a schematic diagram of a circuit where a grounding switch according to a third embodiment of the present invention is located;
fig. 9 is a schematic diagram of a circuit where another grounding switch according to the third embodiment of the present invention is located.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a method for controlling a grounding switch according to an embodiment of the present invention, where the method is applicable to remote control of a grounding switch, and the method can be executed by a logic determination module in a control device of a grounding switch, the device can be implemented by software and/or hardware, the device can integrate a control device having a control function of a grounding switch, and the signal compensation method specifically includes the following steps:
Specifically, a first voltage state of the line detected by the high-voltage electroscope is a voltage state or a non-voltage state. The control device of the grounding disconnecting link can comprise an input module, the input module is electrically connected with the logic judgment module, and the input module is also electrically connected with the voltage transformer and the high-voltage electroscope so as to obtain the voltage and the voltage state of the line where the grounding disconnecting link is located through the voltage transformer and the high-voltage electroscope.
And step 120, determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer.
Illustratively, if the voltage of the line detected by the voltage transformer is lower than 30% of the rated voltage of the line, the second voltage state of the line is determined to be a no-voltage state, and if the voltage of the line detected by the voltage transformer is higher than 70% of the rated voltage of the line, the second voltage state of the line is determined to be a voltage state.
Specifically, fig. 2 is a schematic diagram of a voltage state logical operation according to an embodiment of the present invention, referring to fig. 2, a and B respectively show a first voltage state and a second voltage state, if both inputs a and B are 1(0 is a voltage and 1 is no voltage), that is, both the first voltage state of the line and the second voltage state of the line are no voltage states, then a and B perform a logical and, then, output C is 1, and it is determined that an actual voltage state of the line is a no voltage state.
In addition, after the actual voltage state of the line is determined, the determined actual voltage state of the line can be verified; and if the actual voltage states of the lines before and after verification are different, outputting an alarm signal and sending a corresponding alarm prompt. Exemplarily, fig. 3 is a schematic diagram of a self-test logic operation according to an embodiment of the present invention, referring to fig. 3, a and B respectively represent a first voltage state and a second voltage state, a is 0 or 1, B is 0 or 1(0 is a voltage, and 1 is a no voltage), and if an output D is 0, it represents that the operation is normal, so as to implement self-test and prevent the operation abnormality from affecting the control of the grounding switch.
Specifically, when the actual voltage state of the line is determined to be a non-voltage state, the grounding knife switch can be controlled to perform switching-on operation, so that the remote control of the grounding knife switch is realized.
According to the control method of the grounding disconnecting link, provided by the embodiment of the invention, the voltage of a line detected by a voltage transformer and the first voltage state of the line detected by a high-voltage electroscope are obtained; the circuit is the circuit where the grounding disconnecting link is located; determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer; determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line; therefore, the grounding knife switch is controlled according to the actual voltage state of the line. According to the control method of the grounding disconnecting link provided by the embodiment of the invention, the grounding disconnecting link is controlled according to the actual voltage state of the line determined by the first voltage state of the line and the second voltage state of the line, so that the remote control of the grounding disconnecting link can be realized, manual assistance is not required, and the control reliability can be improved.
Example two
Fig. 4 is a flowchart of a method for controlling a grounding switch according to a second embodiment of the present invention, where the method is applicable to remotely controlling a grounding switch, and the method can be executed by a logic determination module in a control device of a grounding switch, the device can be implemented by software and/or hardware, the device can integrate a control device having a control function of a grounding switch, and the signal compensation method specifically includes the following steps:
And step 220, when the voltage of the line detected by the voltage transformer is lower than a first preset threshold value, determining that the second voltage state of the line is a no-voltage state.
Wherein the first preset threshold may be 30% of the rated line voltage.
And step 230, when the voltage of the line detected by the voltage transformer is higher than a second preset threshold value, determining that the second voltage state of the line is a voltage state.
Wherein the second preset threshold may be 70% of the rated line voltage.
In addition, detecting the high-voltage electroscope according to the first voltage state of the line and the second voltage state of the line to obtain a detection result; and generating a normal or abnormal signal of the high-voltage electroscope according to the detection result, and transmitting the normal or abnormal signal of the high-voltage electroscope to the dispatching master station.
Exemplarily, fig. 5 is a schematic diagram of a logic operation for detecting a high-voltage electroscope according to a second embodiment of the present invention, referring to fig. 5, a and B respectively show a first voltage state and a second voltage state, and specifically, detecting the high-voltage electroscope may include performing logical and negation on the first voltage state of the line and the second voltage state of the line, and obtaining a first output result after a preset time delay; wherein the first voltage state is 0 or 1, and the second voltage state is 0 or 1; performing logical AND on the first voltage state of the line and the second voltage state of the line to obtain a second output result; and performing logical AND on the first output result and the second output result to obtain a final output result, and determining whether the detection result of the high-voltage electroscope is normal or abnormal according to the final output result.
Specifically, when a high-voltage transmission line, namely a line where a grounding disconnecting link is located, runs, a is 0, B is 0, and the first logical and negation is performed to obtain 1, and a period of time t (t is a preset time, generally 0s < t <600s) is kept to be 1; when the high-voltage transmission line is powered off, a period of time T (T < T) is needed, A is 1, B is 1, and the output is 1 through a second logic AND; and after the first logic AND and the inverse of the first logic AND is 1 and the second logic 1, the third logic AND is entered, and the output E is 1, which indicates that the high-voltage electroscope is normal.
And 240, when the first voltage state of the line and the second voltage state of the line are both in a non-voltage state, determining that the line is in the non-voltage state.
And step 250, when the first voltage state of the line and/or the second voltage state of the line are/is a voltage state, determining that the line is in the voltage state.
Specifically, referring to fig. 2, if at least one of a and B is 0, the output C is 0, which indicates that the line is in a pressurized state, and the condition that the grounding switch is not remotely controlled when the line is in a pressurized state is met.
And step 260, controlling the grounding knife switch to perform closing operation when the line is in a non-voltage state.
Specifically, when the actual voltage state of the line is determined to be a non-voltage state, that is, the first voltage state of the line and the second voltage state of the line are both non-voltage states, the grounding switch can be controlled to perform switching-on operation, so that the remote control of the grounding switch is realized.
According to the control method of the grounding knife switch provided by the embodiment of the invention, when the voltage state of the line is determined according to the first voltage state of the line and the second voltage state of the line, the grounding knife switch is switched on, so that the remote control of the grounding knife switch is realized, manual assistance is not needed, and the control efficiency and reliability can be improved; and the high-voltage electroscope is detected according to the first voltage state of the line and the second voltage state of the line, so that the control on the grounding disconnecting link is prevented from being influenced by the abnormality of the high-voltage electroscope.
EXAMPLE III
Fig. 6 is a block diagram of a control device of a grounding switch according to a third embodiment of the present invention, where the control device includes an input module 310, a logic determination module 320, a self-test module 330, a power supply module 340, and an output module 350, and the logic determination module 320 and the self-test module 330 are electrically connected to the input module 310, the power supply module 340, and the output module 350.
The logic judgment module 320 is configured to obtain a first voltage state of a line detected by a voltage transformer and a second voltage state of the line detected by a high-voltage electroscope; the circuit is the circuit where the grounding disconnecting link is located; determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line; and controlling the grounding knife switch in the line to perform switching-off operation or switching-on operation according to the actual voltage state of the line. The self-checking module 330 is configured to perform self-checking on the state of the control device, and output an alarm signal and send a corresponding alarm prompt when detecting that the state of the control device is abnormal. The power module 340 is configured to supply power to the logic determination module and the self-checking module, and is further configured to detect a working state of the self-checking module, and send an alarm prompt when the working state of the self-checking module is detected to be abnormal.
Specifically, the self-test module 330 may perform self-test on the state of the control device through the self-test logic shown in fig. 3. Fig. 7 is a schematic diagram of a grounding switch and a control device according to a third embodiment of the present invention, fig. 8 is a schematic diagram of a circuit on which the grounding switch according to the third embodiment of the present invention is located, fig. 9 is a schematic diagram of a circuit on which another grounding switch according to the third embodiment of the present invention is located, and with reference to fig. 7, fig. 8 and fig. 9, a switching-on/off coil of the grounding switch is connected to a control power supply, the control device of the grounding switch is electrically connected to the switching-on/off coil of the grounding switch, and the control device of the grounding switch can remotely control the grounding switch. The line on which the grounding knife switch is arranged is connected to the bus. The high-voltage electroscope utilizes the distribution characteristics of an electromagnetic field, and a sensor performs electromagnetic induction in the electric field when a circuit is under voltage, so as to serve as a sensing principle of the high-voltage electroscope. The high-voltage electroscope converts the electrical signal detected by the detecting head into an optical signal, and the optical signal drives the high-voltage electroscope to judge whether the equipment is electrified or not by utilizing a photoelectric isolation technology.
In one embodiment, the logic determining module 320 includes a first state determining unit and a second state determining unit; the first state determining unit is used for determining that a second voltage state of the line is a no-voltage state when the voltage of the line detected by the voltage transformer is lower than a first preset threshold; the second state determining unit is used for determining that the second voltage state of the line is a voltage state when the voltage of the line detected by the voltage transformer is higher than a second preset threshold value.
Preferably, the logic determining module 320 includes a non-pressure state determining unit and a pressure state determining unit; the non-voltage state determining unit is used for determining that the line is in a non-voltage state when the first voltage state of the line and the second voltage state of the line are both in the non-voltage state; the pressure state determining unit is used for determining that the line is in a pressure state when the first voltage state of the line and/or the second voltage state of the line is in the pressure state.
Preferably, the logic determining module 320 includes a closing control unit, and the closing control unit is configured to control the grounding switch to perform closing operation when the line is in a non-voltage state.
Preferably, the logic determining module 320 includes a detecting unit and a signal generating unit; the detection unit is used for detecting the high-voltage electroscope according to a first voltage state of the line and a second voltage state of the line and obtaining a detection result; and the signal generating unit is used for generating a normal or abnormal signal of the high-voltage electroscope according to the detection result and transmitting the normal or abnormal signal of the high-voltage electroscope to the dispatching master station.
Optionally, the detection unit includes a first operation subunit, a second operation subunit and a detection subunit; the first operation subunit is used for performing logical AND and negation on a first voltage state of the circuit and a second voltage state of the circuit, and obtaining a first output result after a preset time delay; wherein the first voltage state is 0 or 1, and the second voltage state is 0 or 1; the second operation subunit is used for logically AND-ing the first voltage state of the line and the second voltage state of the line to obtain a second output result; the detection subunit is used for performing logical AND on the first output result and the second output result to obtain a final output result, and determining whether the detection result of the high-voltage electroscope is normal or abnormal according to the final output result.
Preferably, the logic determining module 320 includes a status verifying unit and an alarm prompting unit; the state verification unit is used for verifying the actual voltage state of the determined line; and the alarm prompting unit is used for outputting an alarm signal and sending out a corresponding alarm prompt if the actual voltage states of the lines before and after verification are different.
The control device of the grounding switch provided in this embodiment and the control method of the grounding switch provided in any embodiment of the present invention belong to the same inventive concept, and have corresponding beneficial effects, and detailed technical details in this embodiment are not described in the control method of the grounding switch provided in any embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A control method of a grounding knife switch is characterized by comprising the following steps:
the method comprises the steps of obtaining the voltage of a line detected by a voltage transformer and the first voltage state of the line detected by a high-voltage electroscope; the circuit is a circuit where the grounding disconnecting link is located;
determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer;
determining an actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line;
and controlling the grounding disconnecting link according to the actual voltage state of the line.
2. The method of claim 1, wherein determining the second voltage state of the line based on the voltage of the line detected by the voltage transformer comprises:
when the voltage of the line detected by the voltage transformer is lower than a first preset threshold value, determining that a second voltage state of the line is a no-voltage state;
and when the voltage of the line detected by the voltage transformer is higher than a second preset threshold value, determining that the second voltage state of the line is a voltage state.
3. The method of claim 1, wherein determining the actual voltage state of the line based on the first voltage state of the line and the second voltage state of the line comprises:
when the first voltage state of the line and the second voltage state of the line are both in a non-voltage state, determining that the line is in the non-voltage state;
and when the first voltage state of the line and/or the second voltage state of the line are/is a voltage state, determining that the line is in the voltage state.
4. The method of claim 3, wherein the controlling the grounding switch according to the actual voltage state of the line comprises:
and when the line is in a non-voltage state, controlling the grounding disconnecting link to carry out switching-on operation.
5. The method of claim 1, wherein determining the second voltage state of the line comprises:
detecting the high-voltage electroscope according to the first voltage state of the line and the second voltage state of the line to obtain a detection result;
and generating a normal or abnormal signal of the high-voltage electroscope according to the detection result, and transmitting the normal or abnormal signal of the high-voltage electroscope to a dispatching master station.
6. The method for controlling the grounding knife-switch according to claim 5, wherein the detecting the high-voltage electroscope according to the first voltage state of the line and the second voltage state of the line and obtaining the detection result comprises:
performing logical AND and negation on the first voltage state of the line and the second voltage state of the line, and obtaining a first output result after a preset time delay; wherein the first voltage state is 0 or 1, and the second voltage state is 0 or 1;
performing logical AND on the first voltage state of the line and the second voltage state of the line to obtain a second output result;
and logically AND-connecting the first output result and the second output result to obtain a final output result, and determining whether the detection result of the high-voltage electroscope is normal or abnormal according to the final output result.
7. The method of claim 1, wherein determining the actual voltage state of the line based on the first voltage state of the line and the second voltage state of the line comprises:
verifying the determined actual voltage state of the line;
and if the actual voltage states of the lines are different before and after verification, outputting an alarm signal and sending a corresponding alarm prompt.
8. A control device of a grounding switch is characterized by comprising: the system comprises an input module, a logic judgment module, a self-checking module, a power module and an output module, wherein the logic judgment module and the self-checking module are electrically connected with the input module, the power module and the output module;
the logic judgment module is used for acquiring a first voltage state of a line detected by a voltage transformer and a second voltage state of the line detected by a high-voltage electroscope; the circuit is a circuit where the grounding disconnecting link is located; determining an actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line; and controlling the grounding knife switch in the line to perform switching-off operation or switching-on operation according to the actual voltage state of the line.
9. The control device of the earthing switch according to claim 8, wherein the self-checking module is configured to perform self-checking on the state of the control device, and when the abnormal state of the control device is detected, output an alarm signal and send a corresponding alarm prompt.
10. The control device of the earthing switch according to claim 9, wherein the power module is configured to supply power to the logic determination module and the self-checking module, and is further configured to detect a working state of the power module, and issue an alarm prompt when detecting that the working state of the power module is abnormal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111066884.7A CN113809828B (en) | 2021-09-13 | 2021-09-13 | Control method and device for grounding disconnecting link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111066884.7A CN113809828B (en) | 2021-09-13 | 2021-09-13 | Control method and device for grounding disconnecting link |
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| US20020116092A1 (en) * | 2001-02-09 | 2002-08-22 | Koichi Hamamatsu | System for protecting and controlling substation main circuit components |
| CN108376966A (en) * | 2018-03-09 | 2018-08-07 | 中国电力科学研究院有限公司 | Intelligent substation anti-misoperation locking logic interval association relationship analysis method and system |
| CN208621684U (en) * | 2018-07-19 | 2019-03-19 | 国网江苏省电力有限公司宿迁供电分公司 | A kind of high-tension line electrification display device |
| CN212275827U (en) * | 2020-08-26 | 2021-01-01 | 云南易睿德电网工程技术有限公司 | Circuit induction voltage electricity testing device |
| CN112590624A (en) * | 2020-12-24 | 2021-04-02 | 成都汇控科技有限公司 | Automatic grounding device for 27.5kV contact network of electrified railway and control method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20020116092A1 (en) * | 2001-02-09 | 2002-08-22 | Koichi Hamamatsu | System for protecting and controlling substation main circuit components |
| CN108376966A (en) * | 2018-03-09 | 2018-08-07 | 中国电力科学研究院有限公司 | Intelligent substation anti-misoperation locking logic interval association relationship analysis method and system |
| CN208621684U (en) * | 2018-07-19 | 2019-03-19 | 国网江苏省电力有限公司宿迁供电分公司 | A kind of high-tension line electrification display device |
| CN212275827U (en) * | 2020-08-26 | 2021-01-01 | 云南易睿德电网工程技术有限公司 | Circuit induction voltage electricity testing device |
| CN112590624A (en) * | 2020-12-24 | 2021-04-02 | 成都汇控科技有限公司 | Automatic grounding device for 27.5kV contact network of electrified railway and control method thereof |
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